Carbone Lorraine Composants

Alexandre Potier

Christophe Bommier

Olivier Raymond

Olivier Bernard

Berangere Leclercq

Jerome De Wasch

Dominique Berger

Bérangère Leclercq

An insulating material is fed in and shaped by superposing a plurality of N layers C() of the insulating material. For each layer C, a plurality of n, axial insulating elements Eprecut from the insulating material is formed, a rough form of the tubular insulating device is formed by using an adhesive to assemble the Nelements Eof each layer Cwhich are juxtaposed along a plurality of joining zones J, so that the plurality of joining zones Jof a layer Cis offset relative to the plurality of joining zones J, of the adjacent layer C. Then, by the adhesive is polymerized, and the tubular element rough form is subjected to a heat treatment. The method is economical and makes it possible to obtain a device of high mechanical strength.

Method of manufacturing a tubular insulating device and corresponding device

The present invention relates generally to a composite plate produced by an alternating stack of (n+1) flexible graphite foils and (n) perforated metal reinforcing foils with spurs (where n&#x2267;2). The thicknesses of the flexible graphite foils used are preferably such that any 2 mm slice of thickness of the composite plate comprises at least 3 layers of flexible graphite, and has a graphite density per unit area of at least 2.34 kg/m. For each perforated metal reinforcing foil, the spurs present on the foil generally have a height in relation to the surface of that foil that does not exceed about 1.3 times the thickness of the thinnest of the flexible graphite layers to which it is attached. A composite plate of the present invention enables the manufacture of gaskets that resist temperatures up to 550&#xb0; C. under continuous service.

Flexible graphite/metal multilayer gaskets suited to high-temperature service conditions

Thermal insulation structure having at least one flexible layer based on compressed expanded graphite particles characterized in that the density of the said flexible layer is equal to at least 0.4 g/cm3 (400 kg/m) and in that the thermal insulation structure also includes another layer close to the flexible layer based on compressed graphite particles with a lower density, typically less than 0.4 g/cm(400 kg/m). Preferably, the dense compressed expanded graphite layer has a density of between 0.5 and 1.6 g/cm(500 and 1600 kg/m) and the sub-dense compressed expanded graphite layer has a density of between 0.05 and 0.3 g/cm(50 and 300 kg/m). Thermal insulation elements are also described that are designed to be fitted on furnaces operating under non-oxidizing atmosphere and at temperatures of more than 800&#xb0; C.

Thermal insulation structures comprising layers of expanded graphite particles compressed to different densities and thermal insulation elements made from these structures

Growing community of inventors

Gennevilliers, France

Alexandre Potier